Loudspeaker module and sound production equipment

Abstract

The utility model discloses a loudspeaker module. The loudspeaker module comprises a shell, a loudspeaker monomer and a hot melting bump, a concave assembly cavity is formed in the shell, and a step structure is arranged on the inner circumference of the assembly cavity; the loudspeaker single body is arranged on the step structure; a glue injection groove is formed between the inner side surface of the assembly cavity and the loudspeaker single body; the hot melting protruding block is arranged on the shell, at least part of the hot melting protruding block protrudes out of the inner side face of the assembling cavity, and a glue containing groove communicating with the glue injection groove is formed between the hot melting protruding block and the step structure. The glue injection groove and the glue containing groove are filled with structural glue. According to the loudspeaker module, after the structural adhesive is injected into the adhesive injection groove, the structural adhesive can flow into the adhesive containing groove formed between the hot melting convex block and the step structure, after the structural adhesive is dried, the structural adhesive in the adhesive containing groove forms a hard limiting structure, and during a falling test, the structural adhesive can be prevented from falling off due to the existence of the hard limiting structure. Therefore, the loudspeaker single body can be firmly fixed on the shell, and the anti-falling capability of the loudspeaker module is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of electroacoustic converters, in particular to a loudspeaker module and a sound-generating device. Background Art

[0002] In traditional speaker modules, the bonding between the speaker unit and the shell mainly relies on the affinity between the glue and the shell to keep the speaker intact on the shell. As speaker module tests are becoming more and more stringent, some are still required to pass high-specification drop tests after high-temperature tests, high-temperature and high-humidity tests, temperature cycles, etc. This undoubtedly makes it difficult for the original glue bonding structure to meet customer requirements.

[0003] The traditional method is to increase the drop margin, usually by setting up double glue grooves to increase the glue area so that the drop margin can be increased to meet customer requirements. This method requires more rear cavity space of the shell, which will cause the loss of bass effect. At the same time, due to the setting of double glue grooves, the amount of glue to be applied will increase significantly, which will undoubtedly increase the glue cost and reduce the efficiency of gluing. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a loudspeaker module and a sound-generating device having the loudspeaker module, wherein the fixing strength of the loudspeaker unit and the shell is relatively high and the loudspeaker module has good anti-drop capability.

[0005] In order to solve the above technical problems, the first technical solution adopted by the utility model is: a speaker module, comprising:

[0006] A housing, wherein a recessed assembly cavity is provided in the housing, and a step structure is provided on the inner periphery of the assembly cavity;

[0007] A speaker unit, the speaker unit is placed on the step structure; a glue injection groove is formed between the inner side of the assembly cavity and the speaker unit;

[0008] A hot-melt bump is arranged on the shell, at least a part of the hot-melt bump protrudes out of the inner side surface of the assembly cavity, and a glue containing groove connected to the glue injection groove is formed between the hot-melt bump and the step structure; structural glue is poured into the glue injection groove and the glue containing groove.

[0009] Furthermore, the hot-melt protrusion is formed by hot-melting a partial area of ​​the shell.

[0010] Furthermore, the hot melt protrusion is provided with a plurality of sockets, and the number of the plug rods and the sockets are arranged in a one-to-one correspondence.

[0011] Furthermore, there are multiple hot melt bumps.

[0012] Furthermore, the assembly cavity is rectangular, and the hot melt protrusions are respectively provided on at least two side surfaces of the assembly cavity.

[0013] Furthermore, the hot melt protrusions are respectively provided on two opposite side surfaces of the assembly cavity.

[0014] Furthermore, the opening edge of the assembly cavity is provided with a chamfer structure.

[0015] Furthermore, the speaker unit and the step structure are connected by a sealant.

[0016] Furthermore, the sealant is made of rubber or silicone.

[0017] Furthermore, an annular boss is provided in the shell, and the inner side of the annular boss forms the assembly cavity.

[0018] In order to solve the above technical problems, the first technical solution adopted by the present invention is: a sound-generating device, comprising the above-mentioned speaker module.

[0019] The beneficial effect of the utility model is that after the structural glue is injected into the glue injection groove of the speaker module, the structural glue will flow into the glue storage groove formed between the hot melt bump and the step structure. When the structural glue is dried, the structural glue in the glue storage groove will form a hard limit structure. During the drop test, due to the existence of the hard limit structure, the speaker unit can be firmly fixed on the shell, thereby enhancing the anti-drop ability of the speaker module. The glue storage groove has little effect on the glue injection amount and glue injection efficiency, and will not occupy more rear cavity space in the shell to cause loss of bass effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic structural diagram of a speaker module according to Embodiment 1 of the present utility model;

[0021] Figure 2 This is a partial structural exploded view of the speaker module of the first embodiment of the utility model;

[0022] Figure 3 A cross-sectional view of a speaker module according to Embodiment 1 of the present utility model;

[0023] Figure 4 for Figure 3 A magnified detail of part A.

[0024] Description of labels:

[0025] 1. Shell; 11. Annular boss; 111. Assembly cavity; 112. Chamfer structure; 12. Step structure; 13. Glue injection groove; 14. Glue storage groove;

[0026] 2. Speaker unit;

[0027] 3. Hot melt bumps;

[0028] 4. Structural adhesive;

[0029] 5. Sealant. DETAILED DESCRIPTION

[0030] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in conjunction with the implementation modes and the accompanying drawings.

[0031] Please refer to Figures 1 to 4 , a speaker module, comprising:

[0032] A housing 1, wherein a recessed assembly cavity 111 is provided in the housing 1, and a step structure 12 is provided on the inner periphery of the assembly cavity 111;

[0033] A speaker unit 2, the speaker unit 2 is placed on the step structure 12; a glue injection groove 13 is formed between the inner side of the assembly cavity 111 and the speaker unit 2;

[0034] A hot-melt bump 3 is disposed on the shell 1, and at least a portion of the hot-melt bump 3 protrudes from the inner side surface of the assembly cavity 111, and a glue containing groove 14 connected to the glue injection groove 13 is formed between the hot-melt bump 3 and the step structure 12; the glue injection groove 13 and the glue containing groove 14 are filled with structural glue 4.

[0035] From the above description, it can be seen that the beneficial effect of the utility model is that after the structural glue 4 is injected into the glue injection groove 13 of the speaker module, the structural glue 4 will flow into the glue storage groove 14 formed between the hot melt bump 3 and the step structure 12. When the structural glue 4 is dry, the structural glue 4 in the glue storage groove 14 will form a hard limit structure. During the drop test, due to the existence of the hard limit structure, the speaker unit 2 can be firmly fixed on the shell 1, thereby enhancing the anti-drop ability of the speaker module. The glue storage groove 14 has little effect on the glue injection amount and glue injection efficiency, and will not occupy more rear cavity space in the shell 1 to cause loss of bass effect.

[0036] Furthermore, the hot-melt protrusion 3 is formed by hot-melting a partial area of ​​the shell 1 .

[0037] It can be seen from the above description that the molding method of the hot melt bump 3 is simple and easy to produce.

[0038] Furthermore, there are multiple hot melt bumps 3.

[0039] Furthermore, the assembly cavity 111 is rectangular, and the hot melt bumps 3 are respectively provided on at least two side surfaces of the assembly cavity 111 .

[0040] It can be seen from the above description that a plurality of hot-melt bumps 3 can be used to form a plurality of adhesive grooves 14 , which is beneficial to further enhance the bonding and fixing strength between the speaker unit 2 and the housing 1 .

[0041] Furthermore, the hot melt protrusions 3 are respectively provided on two opposite side surfaces of the assembly cavity 111 .

[0042] It can be seen from the above description that the hard limiting structure formed by the structural adhesive 4 in the adhesive containing groove 14 after drying will limit the two sides of the speaker unit 2 to prevent the speaker unit 2 from being separated from the housing 1 on one side.

[0043] Furthermore, a chamfered structure 112 is provided at the opening edge of the assembly cavity 111 .

[0044] From the above description, it can be seen that the chamfered structure 112 can facilitate the placement of the speaker unit 2 into the assembly cavity 111, and can also increase the bonding area of ​​the structural adhesive 4 in the adhesive injection groove 13, thereby enhancing the bonding strength between the speaker unit 2 and the housing 1.

[0045] Furthermore, the speaker unit 2 and the step structure 12 are connected via a sealant 5 .

[0046] It can be seen from the above description that the sealant 5 can seal the assembly gap between the speaker unit 2 and the step structure 12 to prevent air leakage in the front cavity and affect the sound performance.

[0047] Furthermore, the sealant is made of rubber or silicone.

[0048] It can be seen from the above description that the material of the sealant 5 can be selected according to actual use requirements or production conditions.

[0049] Furthermore, an annular boss is provided in the shell, and the inner side of the annular boss forms the assembly cavity.

[0050] It can be seen from the above description that, compared with the assembly cavity 111 formed by a recess, the assembly cavity 111 formed by the annular boss 11 can increase the rear cavity of the housing 1 and enhance the bass effect.

[0051] A sound-generating device comprises the above-mentioned speaker module.

[0052] It can be seen from the above description that the sound-emitting device has good anti-fall capability.

[0053] Please refer to Figures 1 to 4The first embodiment of the utility model is: a sound-generating device, including a speaker module. The speaker module includes a shell 1, a speaker unit 2 and a hot melt protrusion 3; a recessed assembly cavity 111 is provided in the shell 1, and a step structure 12 is provided on the inner periphery of the assembly cavity 111; the speaker unit 2 is placed on the step structure 12; a glue injection groove 13 is formed between the inner side surface of the assembly cavity 111 and the speaker unit 2; the hot melt protrusion 3 is formed by hot melting a part of the shell 1, and at least a part of the hot melt protrusion 3 protrudes from the inner side surface of the assembly cavity 111, and a glue containing groove 14 connected to the glue injection groove 13 is formed between the hot melt protrusion 3 and the step structure 12; the glue injection groove 13 and the glue containing groove 14 are filled with structural glue 4.

[0054] Specifically, the housing 1 includes a front housing (not shown in the figure) and a rear housing that cooperate with each other. The rear housing includes a bottom plate and a peripheral wall formed by bending and extending the edge of the bottom plate upward. The front housing is fixedly connected to the rear housing and closes the top opening of the rear housing. In this embodiment, an annular boss 11 is provided in the housing 1. The annular boss 11 is located on the inner side of the bottom plate of the rear housing. The inner side of the annular boss 11 forms an assembly cavity 111. The step structure 12 is formed by the protrusion of the bottom area of ​​the inner side of the annular boss 11. The housing 1 is first formed by a plastic injection molding process. After injection molding, a cylindrical protruding structure is reserved on the top surface of the annular boss 11 of the rear housing of the housing 1. Then, a hot melt head is used to hot melt the protruding structure to form a hot melt convex block 3 in the shape of a round mushroom head. The speaker unit 2, the step structure 12 and the bottom plate are enclosed to form a front cavity of the speaker module. A sound outlet connected to the front cavity is provided on the peripheral wall of the rear housing. The speaker unit 2 is rectangular, and the annular boss 11 is set to a rectangular frame shape corresponding to the speaker unit 2. The length of the assembly cavity 111 is greater than the length of the speaker unit 2, the width of the assembly cavity 111 is greater than the width of the speaker unit 2, and a rectangular frame-shaped glue injection groove 13 is formed between the inner side of the assembly cavity 111 and the speaker unit 2. The structural glue 4 includes but is not limited to UV glue. In other embodiments, it is also feasible that the assembly cavity 111 is formed by a depression of a partial area of ​​the bottom plate of the rear shell of the shell 1. It is easy to understand that the glue groove 14 can increase the bonding area of ​​the structural glue 4, and when the structural glue 4 is dry, the structural glue 4 in the glue groove 14 will form a hard limiting structure. During the drop test, due to the existence of the hard limiting structure, the speaker unit 2 can be firmly fixed on the shell 1, thereby enhancing the anti-drop ability of the speaker module.

[0055] Preferably, a partial area of ​​the inner side surface of the assembly cavity 111 is recessed to form a pit, which connects the top surface and the inner side surface of the annular boss 11, and the bottom surface of the pit is flush with the top surface of the step structure 12. The hot melt bump 3 is arranged above the pit and closes the top opening of the pit to form a glue containing groove 14.

[0056] There are multiple hot melt bumps 3. The assembly cavity 111 is rectangular, and hot melt bumps 3 are respectively provided on at least two sides of the assembly cavity 111. In this embodiment, hot melt bumps 3 are respectively provided on the opposite side surfaces of the assembly cavity 111. Specifically, the sound outlet is connected to the longer side of the assembly cavity 111, and two hot melt bumps 3 are respectively provided on the two relatively shorter sides of the assembly cavity 111. The two hot melt bumps 3 located on the same side of the assembly cavity 111 are connected, and a long glue-containing groove 14 is formed between the two hot melt bumps 3 located on the same side of the assembly cavity 111 and the step structure 12.

[0057] Preferably, in order to facilitate the placement of the loudspeaker unit 2 into the assembly cavity 111 and increase the bonding area of ​​the structural adhesive 4 in the adhesive injection groove 13 , a chamfered structure 112 is provided at the opening edge of the assembly cavity 111 .

[0058] The speaker unit 2 is connected to the step structure 12 by a sealant 5. Optionally, the sealant 5 is made of rubber or silicone. The sealant 5 is used to seal the assembly gap between the speaker unit 2 and the step structure 12 to prevent air leakage in the front cavity and affect the sound performance.

[0059] In summary, after the structural glue is injected into the glue injection groove of the speaker module provided by the utility model, the structural glue will flow into the glue storage groove formed between the hot melt bump and the step structure. When the structural glue is dried, the structural glue in the glue storage groove will form a hard limit structure. During the drop test, due to the existence of the hard limit structure, the speaker unit can be firmly fixed on the shell, thereby enhancing the anti-drop ability of the speaker module. The glue storage groove has little effect on the glue injection amount and glue injection efficiency, and will not occupy more rear cavity space in the shell to cause loss of bass effect.

[0060] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent transformations made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in the relevant technical field, are also included in the patent protection scope of the present invention.

Claims

1. A speaker module, characterized in that: include: A housing, wherein a recessed assembly cavity is provided in the housing, and a step structure is provided on the inner periphery of the assembly cavity; A speaker unit, the speaker unit is placed on the step structure; a glue injection groove is formed between the inner side of the assembly cavity and the speaker unit; A hot-melt bump is arranged on the shell, at least a part of the hot-melt bump protrudes out of the inner side surface of the assembly cavity, and a glue containing groove connected to the glue injection groove is formed between the hot-melt bump and the step structure; structural glue is poured into the glue injection groove and the glue containing groove.

2. The speaker module according to claim 1, characterized in that: The hot-melt protrusion is formed by hot-melting a partial area of ​​the shell.

3. The speaker module according to claim 1, characterized in that: The number of the hot melt bumps is multiple.

4. The speaker module according to claim 3, characterized in that: The assembly cavity is rectangular, and the hot-melt protrusions are respectively arranged on at least two side surfaces of the assembly cavity.

5. The speaker module according to claim 4, characterized in that: The glue containing grooves are respectively arranged on two opposite side surfaces of the assembly cavity.

6. The speaker module according to claim 1, characterized in that: The opening edge of the assembly cavity is provided with a chamfer structure.

7. The speaker module according to claim 1, characterized in that: The speaker unit and the step structure are connected via a sealant.

8. The speaker module according to claim 7, characterized in that: The sealant is made of rubber or silicone.

9. The speaker module according to claim 1, characterized in that: An annular boss is arranged in the shell, and the inner side of the annular boss forms the assembly cavity.

10. A sound-generating device, characterized in that: A speaker module comprising any one of claims 1 to 9.

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